After going through 5 (yes five!) car chargers for my axim x50v that either flickered the screen or wouldn't charge when it was on, I finally have one that works!
Look
here
I received it 1 day after purchasing and gave it the hardest test possible. Whilst running WiFi and bluetooth and TomTom navigator 5 from an initial battery power of 7%, it successfully charged the x50v with screen at maximum brightness.
Don't waste time on any others - get this one!
rabdo